Percentage Increase Calculator

Use this free percentage increase calculator to find out how much a value has risen in percentage terms. Enter the original value and the new value — the calculator shows the percentage increase, the actual amount of increase, and the multiplier instantly. Useful for salary rises, price comparisons, investment growth, and everyday maths.

📈 Percentage Increase Calculator




Percentage Increase Formula

The formula for percentage increase is:

Percentage Increase = ((New Value − Original Value) ÷ Original Value) × 100

For example: if a price rises from £80 to £100, the increase is £20, and the percentage increase is (20 ÷ 80) × 100 = 25%.

How to Calculate Percentage Increase — Step by Step

  1. Subtract the original value from the new value to get the amount of increase
  2. Divide the increase by the original value
  3. Multiply by 100 to convert to a percentage

Percentage Increase Examples

Original ValueNew ValueIncreasePercentage Increase
£25,000 salary£27,500 salary£2,50010%
£200 monthly bill£230 monthly bill£3015%
£150,000 house£180,000 house£30,00020%
500 website visitors750 website visitors25050%
£1,000 investment£1,120 investment£12012%
80 kg body weight84 kg body weight4 kg5%

Where Percentage Increase Is Used

Percentage increase is one of the most widely used calculations in everyday life and business. Common situations where you need it:

  • Pay rises — calculating how much your salary has increased in percentage terms
  • Price rises — working out how much more expensive something has become (energy bills, food prices, rent)
  • Investment growth — seeing your portfolio or savings return as a percentage
  • Business metrics — tracking revenue growth, customer growth, or conversion rate improvement
  • Property values — how much a house has increased in value since purchase
  • Fitness tracking — measuring improvement in performance, weight, or strength

Percentage Increase vs Percentage Points

These two terms are often confused. A percentage increase measures the relative change from the original value. Percentage points measure the absolute difference between two percentages.

Example: if an interest rate rises from 3% to 4%, that is an increase of 1 percentage point but a 33.3% percentage increase (because 1 ÷ 3 × 100 = 33.3%). The distinction matters especially in finance and economics reporting.

UK Salary Increase Example

If you earn £32,000 and receive a pay rise to £34,500, your percentage increase is:

(34,500 − 32,000) ÷ 32,000 × 100 = 7.81% pay rise

To see how this affects your take-home pay, use our UK Salary Calculator.

Frequently Asked Questions

What is percentage increase?

Percentage increase shows how much a value has risen relative to its original amount, expressed as a percentage. A result of 25% means the new value is 25% higher than where it started.

What is the formula for percentage increase?

Percentage Increase = ((New Value − Original Value) ÷ Original Value) × 100. Divide the change by the original, then multiply by 100.

Can percentage increase be more than 100%?

Yes. If a value doubles, that is a 100% increase. If it triples, that is a 200% increase. There is no upper limit — a value can increase by 500% or more.

Can percentage increase be negative?

No. If the new value is lower than the original, that is a percentage decrease, not an increase. Use our Percentage Decrease Calculator for that.

What is the difference between percentage increase and a multiplier?

A multiplier shows the ratio of the new value to the original (e.g. 1.25 = 25% increase). A percentage increase shows the change as a percentage of the original. They represent the same information in different forms.

How do I reverse a percentage increase?

To find the original value before an increase, divide the new value by (1 + percentage increase / 100). For example, if a price is now £125 after a 25% increase: £125 ÷ 1.25 = £100 original price.

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